Hanging saws



N. T. GOFFIN.

HANGING SAWS.

PATENTBD'JULY 19, 1853.

F1 gURE J m' uunn nummnmmm & l

UNITED STATES PATENT OFFICE.

NATHAN T. OOFFIN, OF KNIGHTSTOWVN, INDIANA.

HANGING SAWS.

Specification of Letters Patent No. 9,856, dated July 19, 1853.

To all whom it may concern:

Be it known that I, NATHAN T. Corrm, of Knightstown, in the county ofHenry and State of Indiana, have invented a new and useful Improvementin Hanging Mill- Saws; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the annexed drawings, forming part ofthis specification, in which Figure 1 is a front elevation of the sawgate, and fender beams and posts, showing the guides, and manner ofhanging the saw. Fig. 2 is a section upon the line 09 y of Fig. 1. Fig.3 is a top view of the saw gate showing the contrivances for adjustingthe saw. Fig. t is a horizontal section upon the line y y of Fig. 1 onan enlarged scale. Fig. 5 is section upon line 2 2 Fig. 1, large scale.Fig. 6 is vertical section on line 00 00 Fig. 1.

Similar letters in the several figures refer to the same parts of themachine.

In the drawings (A, A) represent the fender posts, (B, B) the fenderbeams. (C) thesaw gate, (D) the saw, (E) the upper stirrup and (E) thelower. These stirrups are constructed in the usual manner, except thatthe upper one (E) fits the gate stile loosely, so as to conform to themovements of the regulating screws; the saw is drawn up and tightened inthe usual manner by the nuts (a, (4) upon the bolts (Z), 6) of thestirrup (E), but the cap (0) is furnished with the knife edge projection(0), upon its under side, which projection works in the concavity orgroove (cZ) in the plate ((Z') upon the top of the upper stile of thegate (G).

The adjusting apparatus consists of the straps (e, 0), plates (f f, g g,and h h) and screws (70 70, Z Z, and m m). The straps (e, e) are securedto the upper stile of the gate (C), the plates (7, f) pass through it,on each side of the stirrup bolts b, 6), being kept in position by thescrews (70, 7c); the plates (g, g) are notched to rest upon the plates(f, f) and are held in front and rear of the stirrup (E) by the screws(Z, Z). The plates (h, h) embrace the lower stirrup (E) by means ofbolts passing through their extremities; and have the screws (m, m)working through them to the face of the saw.

The guide consists of the frame (F) suspended to the fender beam (B) bythe journals and bearings (F F); and the slide (G) having a verticalmotion under the straps (n, a), at the lower extremity of which slide isthe horizontal arm (H), formed of two jaws embracing the saw D; thesejaws are furnished with the wooden followers (0, 0), regulated by thetemper screws (p, p); and through the jaws are the channels 9 g for thepassage of oil to the saw; the slide (G) is held at any required pointby the screws (8) passing through the straps (n, n).

The operation of my machine is as follows: The saw being placed in thestirrups in the usual manner it is drawn moderately tight by the nuts(a, a), its position regu lated laterally by the screws (7a, 7a and m,m), and the requisite pitch given by the screws (Z, Z) after which thetightening is completed. The saw hung as above stated, the guide frame(F) is let down, and the slide (G) lowered to the proper distance, andfastened by the screws (.9), the followers (0, 0) are adjusted by thetemper screws (29, 29) so that the saw will glide easily between them,and the machine is ready for use.

The advantages resulting from my method of hanging and guiding are wellworthy of attention. The pitch of the saw can be regulated with greatfacility to the different sizes of logs, by the screws (Z, Z). This isvery essential, as small logs require the saw to be more nearly verticalthan those of large dimensions; and by my method of hanging this isaccomplished easily and effectively. The knife edge (0) and hollow, orgrooved plate (cZ) permit the stirrup to be moved backward or forwardwithout binding or twisting the stile of the saw gate, as would be thecase if the cap rested directly upon its top.

This method of hanging the saw admits of its being removed, and againreturned to its original position, by simply removing the tighteningnuts (a, a) and loosening the screws (m) or (m) on one side of the lowerstirrup E). By this operation we are enabled to take the saw from thestirrups leaving the adjusting plates and screws in such positions thatthe saw when returned will be hung precisely as it was before removal.

for the purpose of regulating the rake of the saw in the mannerdescribed.

In testimony whereof I have hereunto signed my name before twosubscribing Witnesses.

N. T. GOFFIN.

lVitnesses GEO. PATTEN, LUKE DAVIS.

